How To Remotely Access GUI Applications Using Docker and Caddy on Ubuntu 18.04
- Creating the supervisord Configuration. Now that your server is running and Docker is installed, you are ready to begin configuring your application’s container.
- Setting Up the OpenBox Menu. Now that your process manager is configured, let’s set up the OpenBox menu. ...
- Creating the Dockerfile. Now that OpenBox is configured, you’ll be creating the Dockerfile, which ties everything together. In the first stage, you are building easy-novnc.
- Building and Running the Container. The next step is to build your container and set it to run at startup. ...
- Setting up Caddy. In this step, you’ll set up the Caddy web server to provide authentication and, optionally, remote file access over WebDAV.
- Testing and Managing the Application. Let’s access your application and ensure that it’s working. ...
Full Answer
How to install Docker on a remote machine?
While Docker Machine can be installed on a local or a remote system, the most common approach is to install it on your local computer (native installation or virtual machine) and use it to provision Dockerized remote servers.
How to access Docker containers webapps from remote machines?
I figured out what I missed, so here's a simple flow for accessing docker containers webapps from remote machines: Step #1 : Bind physical host ports (e.g. 22, 443, 80, ...) to container's virtual ports. possible syntax: Step #2 : Redirect host's physical port to container's allocated virtual port. possible (linux) syntax:
How can I send requests to a docker server remotely?
Since the communication protocol used between the docker client and server is plain HTTP, you should be able to send requests to the server remotely, if you can make the daemon listen for HTTP requests at a port instead of a local UNIX socket. As it turns out, you can totally do that.
How do I access Docker API from another computer?
To access the Docker API from another computer, use the IP address of the Ubuntu computer found at either wlan0 or eth0, depending on whether you use wifi or ethernet network connection. To learn the IP addresses of the different interfaces, use the ifconfig command in a terminal window.
How do I access Docker container remotely?
Connect to remote Docker over SSHUse ssh-keygen or similar to get and configure a public/private key pair for SSH authentication. ... Configure ssh-agent on the local system with the private key file produced above. ... Verify that your identity is available to the agent with ssh-add -l .More items...
How do I access Docker in Ubuntu?
You can access to docker using Docker CLI - docker command. And then if you want to use dashboard, you can install some dashboad that work with docker like Portainer .
How do I run a Docker command remotely?
To use the remote host as your Docker host instead of your local machine, set the DOCKER_HOST environment variable to point to the remote host. This variable will instruct the Docker CLI client to connect to the remote server. Now any Docker command you run will be run on the Droplet.
Is there a GUI for Docker Ubuntu?
So, as you can see, Portainer is a powerful graphical UI that can be used to manage your Docker-CE instance running on your Linux Desktop.
How do I connect to a container in Ubuntu?
Method 1: Use docker exec to Run Commands in a Docker Container.Method 2: Use the docker attach Command to Connect to a Running Container.Method 3: Use SSH to Connect to a Docker Container. Step 1: Enable SSH on System. Step 2: Get IP Address of Container. Step 3: SSH Into Docker Container.
How do I access a docker container?
To check the container status and run IBM Workload Automation commands, you need to access the containers as described below:Obtain the container ID by running the following command: docker ps. ... Access the Docker container by running the following command: docker exec -it
Can I SSH to Docker container?
The SSH method works fine for Docker containers, too. That said, you can SSH into a Docker container using Docker's built-in docker exec . If you do not need an interactive shell, you can also use the docker attach command to connect the host's stdin and stdout to the running container and execute remote commands.
Is Docker CLI still free?
With its focus on open source communities, individual developers, education, and small businesses, Docker Personal continues to allow free use of Docker– including Docker CLI, Docker Compose, Docker Engine, Docker Desktop, Docker Hub, Kubernetes, Docker Build/BuildKit, Docker Official Images, Docker Scan, and more.
What is Docker host IP?
AFAIK, in the case of Docker for Linux (standard distribution), the IP address of the host will always be 172.17. 0.1 (on the main network of docker, see comments to learn more).
How do I access Docker UI in Linux?
You can do it by running the following command:apt-get update -y. ... wget https://download.docker.com/linux/ubuntu/gpg. ... nano /etc/apt/sources.list.d/docker.list.deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable.apt-get update -y.apt-get install docker-ce -y.Using default tag: latest.More items...
Is Portainer free?
Start using Portainer Business Edition, our fully featured commercial product, free for your first five nodes. Business Edition includes all of the features of Community Edition, plus: Role Based Access Controls (RBAC) Authentication and Activity Audit Logging.
Is there any GUI for Docker?
Kitematic automates the Docker installation and setup process and provides an intuitive graphical user interface (GUI) for running Docker containers. Kitematic integrates with Docker Machine to provision a VirtualBox VM and install the Docker Engine locally on your machine.
How do I start docker?
Get started with Docker ComposeStep 1: Setup. ... Step 2: Create a Dockerfile. ... Step 3: Define services in a Compose file. ... Step 4: Build and run your app with Compose. ... Step 5: Edit the Compose file to add a bind mount. ... Step 6: Re-build and run the app with Compose. ... Step 7: Update the application.More items...
How do I run docker?
Start an app containerStart your container using the docker run command and specify the name of the image we just created: $ docker run -dp 3000:3000 getting-started. Remember the -d and -p flags? ... Go ahead and add an item or two and see that it works as you expect. You can mark items as complete and remove items.
How do I start docker daemon in Linux?
Install DockerLog into your system as a user with sudo privileges.Update your system: sudo yum update -y .Install Docker: sudo yum install docker-engine -y.Start Docker: sudo service docker start.Verify Docker: sudo docker run hello-world.
What is docker Ubuntu?
Docker is a container service which allows one to run applications or even operating systems on a host operating system as containers. Containers are a new and exciting technology that has evolved over the last couple of years and being adopted by a lot of key organizations.
What is Docker's main component?
Docker works in something called a client-server architecture. The main component that handles all your containers, volumes, networks, etc is the docker daemon that runs in the background. The docker command is nothing but the client application.
What do you need to tell your Docker engine and client about them?
Once the certificates and private keys are ready, you need to tell your docker engine and client about them, along with exposing the engine API to a public TCP port and letting the client use the docker engine that's not sitting at the local machine.
Can Portainer be remotely accessed?
All can be done remotely. Many monitoring tools, like Portainer, need access to the Docker API endpoint to monitor details like networks, running containers, etc. Normally to add a server to the endpoint list, you'd have to deploy a Portainer agent on the server first and bind some port from the container to the host.
What is Docker Machine?
Docker Machine is a tool that makes it easy to provision and manage multiple Docker hosts remotely from your personal computer. Such servers are commonly referred to as Dockerized hosts and are used to run Docker containers.
How many bash scripts are there in Docker?
There are three Bash scripts in the Docker Machine GitHub repository you can install to make working with the docker and docker-machine commands easier. When installed, these scripts provide command completion and prompt customization.
Can you create a container on a remote machine?
If you intend to create containers on a remote machine, your Docker client must be pointing to it — that is , it must be the active machine in the terminal that you’re using. Otherwise you’ll be creating the container on your local machine. Again, let your command prompt be your guide.
Why do you need to set nodaemon to true?
You need to set nodaemon to true because it will be running inside of a Docker container as the entrypoint. Therefore, you want it to remain running in the foreground. You also are setting pidfile to a path accessible by a non-root user (more on this later), and logfile to stdout so you can see the logs.
Can you run native applications in Docker?
Even with the growing popularity of cloud services, the need for running native applications still exists. By using noVNC and TigerVNC, you can run native applications inside a Docker container and access them remotely using a web browser.
Step 1 – Create Atlantic.Net Cloud Server
First, log in to your Atlantic.Net Cloud Server. Create a new server, choosing Ubuntu 20.04 as the operating system with at least 2GB RAM. Connect to your Cloud Server via SSH and log in using the credentials highlighted at the top of the page.
Step 3 – Configure Docker Daemon
First, you will need to create a directory to store the Docker daemon configuration file. You can create it with the following command:
Step 4 – Configure Local System to Connect to the Docker Daemon
Before starting, make sure Docker and Docker compose are installed on your local system. Now, you will need to configure your local system to connect to the Docker daemon on the remote Docker host.
Conclusion
In the above guide, you learned how to configure Docker daemon to connect the remote Docker host over TCP and manage it from the local system. I hope this will make your day-to-day Docker tasks much easier. Start using Docker daemon today on a VPS from Atlantic.Net!
Troubleshooting Remote Desktop into Ubuntu 20.04 from Windows
From time to time I have received a black screen after initiating the remote connection to the Xrdp Remote Desktop Protocol (RDP) server. Although I’m not sure how to completely resolve this issue but logging out from the Ubuntu desktop prior to making a remote connection have solved it at least temporarily.
Xrdp BlackScreen
From time to time I have received a black screen after initiating the remote connection to the Xrdp Remote Desktop Protocol (RDP) server. Although I’m not sure how to completely resolve this issue but logging out from the Ubuntu desktop prior to making a remote connection have solved it at least temporarily.
Quick reference
Where to get help: the Docker Community Forums, the Docker Community Slack, or Stack Overflow
What is Ubuntu?
Ubuntu is a Debian-based Linux operating system that runs from the desktop to the cloud, to all your internet connected things. It is the world's most popular operating system across public clouds and OpenStack clouds. It is the number one platform for containers; from Docker to Kubernetes to LXD, Ubuntu can run your containers at scale.
What's in this image?
This image is built from official rootfs tarballs provided by Canonical (specifically, https://partner-images.canonical.com/oci/ for Bionic and later and https://partner-images.canonical.com/core/ for older releases).
How is the rootfs built?
The tarballs published by Canonical are built from scripts that live in the livecd-rootfs project, especially live-build/auto/build.
What Is Docker Remote Access?
Method 1: Setup Remote Docker Access Using Ssh
- One of the best thing about using SSHhere is that it requires a lot less work than the other method. If you already have SSH keys set up, it's literally a one-step process. Before moving forward I want you to have this mental picture in place, for understanding how this SSH method works, and why it's configured the way it's configured. To confirm the above statement, run any …
Method 2: Using A Public TCP Port with TLS Authentication
- This method is more complicate than the previous one, but has it's advantages like not having to use the dockergroup at all. The idea here is simple, you're going to create your own certificates and private keys, and then use a TCP port to access the dockerdaemon through not plain HTTP, but a secure HTTPS channel. It is analogous to a website. In case of a website, you configure it …
Preparing The Certificates and Keys
- In the following steps, you'll be generating certificates and private keys for your server and client. Certificate Authority To make the transactions simple, I'll be using my client machine to generate all the files. You can use a separate machine for that if necessary. A CA certificate is nothing but a self-signed certificate. But first, you need to generate your CA's private key. Use the following co…
Setting Up The Environment
- Once the certificates and private keys are ready, you need to tell your docker engine and client about them, along with exposing the engine API to a public TCP port and letting the client use the docker engine that's not sitting at the local machine. The following steps go through exactly that. The docker host First, copy over three files from the administrator's machine, the CA certificate (…
Test The Setup
- Now that everything is done, you can test it by running docker info, or run any random container, whichever comes to your mind. You can also use curl to test it (Remember? These are simple HTTP requests). Use the following as an alternative to docker info This will output a JSON object that you can parse using something like jq. You can also try and run an Nginx server with docker…
Which Method to use? TCP Or Ssh?
- Both methods has their own merits. The SSH method is easier if you don't want to go through many hoops. But some applications like Portainer won't work with the SSH method for remote daemon access. Using the TCP method also eliminates the issues of "using or not using the docker group" by default. Choose whichever method satisfies your purpose. I hope this tutorial …
Prerequisites
Step 1 — Creating The Supervisord Configuration
- Now that your server is running and Docker is installed, you are ready to begin configuring your application’s container. Since your container consists of multiple components, you need to use a process manager to launch and monitor them. Here, you’ll be using supervisord. supervisordis a process manager written in Python that is often used to orchestrate complex containers. First, c…
Step 2 — Setting Up The Openbox Menu
- Now that your process manager is configured, let’s set up the OpenBox menu. This menu allows us to launch applications inside the container. We will also include a terminal and process monitor for debugging if required. Inside your application’s directory, use nano or your favorite text editor to create and open a new file called menu.xml: Now add the following code to menu.xml: This X…
Step 3 — Creating The Dockerfile
- Now that OpenBox is configured, you’ll be creating the Dockerfile, which ties everything together. Create a Dockerfile in your container’s directory: To begin, let’s add some code to build easy-novnc: In the first stage, you are building easy-novnc. This is done in a separate stage for simplicity and to save space — you don’t need the entire Go toolchain in your final image. Note t…
Step 4 — Building and Running The Container
- The next step is to build your container and set it to run at startup. You’ll also set up a volume to preserve the application data between restarts and updates. First build your container. Make sure to run these commands in the ~/thunderbirddirectory: Now create a new network that will be shared between the app’s containers: Then create a volume to store the application data: Finally…
Step 5 — Setting Up Caddy
- In this step, you’ll set up the Caddy web server to provide authentication and, optionally, remote file access over WebDAV. For simplicity, and to allow you to use it with your existing reverse proxy, you’ll run it in another container. Create a new directory and then move inside it: Now create a new Dockerfile using nanoor your preferred editor: Then add the following directives: This Doc…
Step 6 — Testing and Managing The Application
- Let’s access your application and ensure that it’s working. First, open http://your_server_ip:8080 in a web browser,log in with the credentials you chose earlier, and click Connect. You should now be able to interact with the application, and it should automatically resize to fit your browser window. If you right-click on the black desktop, you should see a menu that allows you to access a termin…
Conclusion
- You have now successfully set up a Docker container for Thunderbird and then, using Caddy, you’ve configured access to it through a web browser. Should you ever need to upgrade your app, stop the containers, run docker rm thunderbird-app thunderbird-web, re-build the images, and then re-run the docker runcommands from the previous steps above. Your data will still be preserved …